import { is } from "../../../util/ModelUtil";

import { roundBounds } from "diagram-js/lib/layout/LayoutUtil";

import { hasPrimaryModifier } from "diagram-js/lib/util/Mouse";

var SLIGHTLY_HIGHER_PRIORITY = 1001;

/**
 * Invoke {@link Modeling#resizeLane} instead of
 * {@link Modeling#resizeShape} when resizing a Lane
 * or Participant shape.
 */
export default function ResizeLaneBehavior(eventBus, modeling) {
  eventBus.on("resize.start", SLIGHTLY_HIGHER_PRIORITY + 500, function(event) {
    var context = event.context,
      shape = context.shape;

    if (is(shape, "bpmn:Lane") || is(shape, "bpmn:Participant")) {
      // should we resize the opposite lane(s) in
      // order to compensate for the resize operation?
      context.balanced = !hasPrimaryModifier(event);
    }
  });

  /**
   * Intercept resize end and call resize lane function instead.
   */
  eventBus.on("resize.end", SLIGHTLY_HIGHER_PRIORITY, function(event) {
    var context = event.context,
      shape = context.shape,
      canExecute = context.canExecute,
      newBounds = context.newBounds;

    if (is(shape, "bpmn:Lane") || is(shape, "bpmn:Participant")) {
      if (canExecute) {
        // ensure we have actual pixel values for new bounds
        // (important when zoom level was > 1 during move)
        newBounds = roundBounds(newBounds);

        // perform the actual resize
        modeling.resizeLane(shape, newBounds, context.balanced);
      }

      // stop propagation
      return false;
    }
  });
}

ResizeLaneBehavior.$inject = ["eventBus", "modeling"];
